Python – How to change autopct text to white and bold in a pie chart?

Question

I want to change the autopct text to bold and white.

If I insert textprops={‘color’:’white’, ‘weight’:’bold’, ‘fontsize’:12.5} in ax1.pie(..) the labels disappear.

Can someone help me please?

sizes1 = [3, 19]
explode1 = (0, 0.05)

fig, (ax1, ax2) = plt.subplots(1,2, figsize=(10,10))
labels = ('CRD = 1', 'CRD = 0')

#fig1, ax1 = plt.subplots()
ax1.pie(sizes1,explode= explode1, labels=labels, autopct='%1.1f%%',
        shadow=False,startangle=40, colors=('tab:red', 'tab:blue'))
ax1.set_title('Frauen', fontdict={'fontsize': 17}, y=0.8)

ax1.axis('equal')

sizes2 = [10, 24]
explode2 = (0, 0.05)


ax2.pie(sizes2, labels=labels, autopct='%1.1f%%',
        shadow=False,explode = explode2, startangle=345, colors=('tab:red','tab:blue'), )
ax2.set_title('Männer', fontdict={'fontsize': 17}, y=0.8)
ax2.axis('equal')

Pie Plots

Asked By: Mischa

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Source

Answer 1

Because the textprops apply to both, the labels and the autopercentage texts, you need to format the autopercentage texts externally to the pie function.

import matplotlib.pyplot as plt

sizes1 = [3, 19]
explode1 = (0, 0.05)
labels = ('CRD = 1', 'CRD = 0')

fig1, ax1 = plt.subplots()
_, _, autopcts = ax1.pie(sizes1,explode= explode1, labels=labels, autopct='%1.1f%%',
        shadow=False,startangle=40, colors=('tab:red', 'tab:blue'))

plt.setp(autopcts, **{'color':'white', 'weight':'bold', 'fontsize':12.5})
ax1.set_title('Frauen', fontdict={'fontsize': 17})

plt.show()

Answered By: ImportanceOfBeingErnest

Answer 2

You are plotting white on white:

In your case the labels disappear because you are setting the color to white in the textprops argument. This is how you are doing it:

textprops={'color':'white', 'weight':'bold', 'fontsize':12.5}

and it plots white labels on white background, hence not seeng it. You can either:

1. change the plot background color to a different color

fig.set_facecolor('lightgrey')

or

2. change the textprops color to something different:

textprops={'color':"blue", 'size': 10, 'weight':'bold'}

You can easily manage the font size, style and color using the textprops argument in the ax.pie() function.

Answered By: Amir Charkhi

Python – How to change autopct text to white and bold in a pie chart?

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